trunks of brachial plexus

trunks of brach·i·al plex·us

the superior, middle, and inferior trunks; formed by spinal nerves C5-T1; as they pass into the axilla, each trunk separates into an anterior and posterior division; fibers in these six divisions then regroup to form the lateral, medial, and posterior cords.
Synonym(s): trunci plexus brachialis [TA]
References in periodicals archive ?
The upper and middle trunks of brachial plexus were involved in our patient.